Top and side seal-closure.



C. HAMMER.

TOP AND SIDE SEAL CLOSURE.

APPLICATION FILED MAY 2a. 1916.

Patented July 3, 1917.

5] W00 144501, Charles fiammer CHARLES HAMMER, OF NEW YORK, Y.,ASSIGN'OR, BY DIRECT AND MESNE ASSIG-Iil' MENTS, T AMERICAN METAL CAP(30., OF BROOKLYN, NEW YORK.

TOP AND SIDE SEAL-CLOSURE.

To all whom it may concern." v

Be it known that 1, CHARLES HAMMER,

a citizen of the United States, residing at sures, of which thefollowing is a specification.

This invention relates to caps or covers for jars adapted to containvarious food articles, wherein it is necessary to provide a hermeticclosure, and in which it is customary to effect the closing operation orsecurement of the closure on the jar, in a closed chamber from which theair has been I withdrawn, to produce what is usually termed a vacuumseal.

' The object of the present invention is to provide a closure of thischaracter that will be securely retained on the jar ,by the engagementbetween the cap, and the outer cylindrical side of the jar at its upperend; and which closure can be placed on top of the jar and secured theresimply by downward pressure 'on top of the cap at its margins; withoutreformation of the cap flange, and without the employment of any dies orchucks, or any means for bringing the flange portion of the closure intoholding engagement withthe jar, but which closure will be secured on thejar simply by a downward pressure on its top. And furthermore, which isaccomplished without the use of any special retaining configuration onthe outer engaging face of the jar, the jar having merely a cylindricalside wall adjacent the end, that may be made slightly tapering ifpreferred.

A further object of the invention is to provide a form of closureprovided with the friction retaining means, as set forth, which willcause a hermetic seal to be formed between the end portion of the jarand the closure; and which seal will .result from the mere operation ofapplying downward pressure on the closure'to produce the frictionlocking engagement thereof.

In the accompanying drawing illustrating embodiments of my inventionFigure 1 is a plan view of the closure. Fig. 2 is a vertito cal sectionat one side of the closure, that rests on top of the jar as firstapplied. Fig.

3 is a view similar to Fig. 2, but with the closure forced down on thejar to final sealing position. Fig. 4 is a modification of the cap shownin Fig. 1. Fig. 5 shows another form Specification of Letters Patent.

Patented July 3, 1%17.

of cap, as first applied tothe jar; and Fig. 6 shows the cap as shown inFig. 5, in the final sealing position on the jar.

The closure or cap is made of thin sheet metal, andcomprises a topportion 12-, with a depending flange portion denoted generally by 13.For the purpose of engaging the outer substantially cylindrical wallportion 14 of the jar 15, I provide an inwardly extending rim or head ofannular form on the lower portion of the flange. As shown in Fig. 2, theflangeprojects inwardly at 16 at substantially a right angle with theflange portion 13; and thereupon the flange is-extended downwardly at 17'in a substantially conical form, diverging downwardly. It will beobserved that the flange portion 13 above the inwardly extending portion16, is substantially conical and diverges dowm wardly. Thereby isformeda ledge or shoulder inside of the cap at the wall 16, and this iswell adapted to receive and retain the ring washer 18 that is employedin this style of cap; and which is preferably of a special compositionsomewhat similar to soft rub.- ber. The washer is of considerable depthrelative to its width, and practically engages all the inner wall of theconical flange portion 13. Between the diverging wall 13 and the flattop 12 of the cap, is a curved connecting portion 19.

The rim portion 17 is preferably reinforced by suitable means, suchashaving its lower edge turned or rolled outwardly to provide a head 20.But in the modification shown in Fig. ithis bead is omitted and has noreinforcement; the cap being otherwise identical with that describedwith reference to Fig. 2. y

The jar 15 as shown is provided with its top portion 14: ofsubstantially cylindrical form on the outer wall, and the cap adaptedfor this size of jar, has an internal diameter at the rim portion 17adapted to engage the jar at about the middle portion of .the divergingconical wall 17, when the cap is first placed on top of the jar, asindicated in Figs. 2 and 5. Thereupon pressure is applied on top of thejar, and will engage it at the highest part on the curved edge 19, andthe cap. is forced downwardly. This will cause a slight expansion of therim portion 17 because of its reduced diameter at the upper ortionadjacent the shoulder 16, and cause t e rim to have a lochng engagementto expand downwardly to a certain extent; to completely fill and closethe space between the outer wall 14- ofthe jar and the walls 13 and 16of the cap. Theend of the jar will also force the washer material upwardto extend over the upper edge of the jar, be-' tween the same and the romdedportion19 of the cap, thus forming a top andside seal. By thisaction the entire space between the side and top of the jar and theadjacent wall of the cap above the rim 17 is filled by the compositionwasher, as clearly shown in Figs. 3 and 6. But if the jar should haveits wall 14 of slightly reduced diameter, it will not have the frictionlocking engagement with the rim 17. Yet the jar will cause the washer toassume the same shape as shown in Fig. 3, and a top and side seal willstill be effected that will securely lock and hold the cap on the jar,and produce a hermetic Seal.

In the modification shownin Figs. 5 and- 6, the cap is formedsubstantially identical with that of Figs. 2 and 3, except that a slightbead is provided by forcing the lower portion of the conical rim wall 13outwardly a short distance, ,forming a kind of bead 22, as shown. Whenthe cap of Fig. 5 is forced down on the jar, the washer 18 will beforced outwardly to fill the space in the bead 22, as shown in Fig. 6.The form of cap shown in Fig. 4 will operate in the same manner as theother caps, but does not have the advantage of the reinforcement by thebead 20.

Having thus described my invention, what I claim is 1. A jar closurecomprising a circular top with an annular side flange having an upperdivergent conical part that connects with the top b an arched upwardlyprojecting portion, t e flange having a rim extending abruptly inwardatv a right angle to the upper conical part and then extendingdownwardly in a diverging conical form, which rim is adapted to have afriction. locking engagement with a substantially straight walled jar tosolely by downward pressure on the top of the closurewithout reformationof the closure,,and a comparatively thin Y gasket of compressiblesealing material held in the closure by the rim," which is 'com pressedon application of the closure to entirely fill the space between the jarside and top and the flange side and top portion above the rim.

2. A jar closure comprising a circular top with an annular side flangehaving an upper divergent conical part that connects with the top by anarched upwardly projecting portion, the flange having a rim extendingabruptly inward at a right angle to the upper conical part and thenextending downwardly in a diverging conical form with the margin bentoutwardly to form a bead, which rim is adapted to have a frictionlocking engagement with a substantially straight-walled jar top solelyby downward pressure on the top-of the closure without reformation ofthe closure, and a comparatively thin gasket of compressible sealingmaterial held in the closure by the rim, which is compressed onapplication of the closure to entirely fill the space between the jarside and top and the flange side and top portion above the rim.

' 3. A jar closure comprising a circular top with ainannular side flangehaving an upper divergent conical part that connects with the top by an'arched upwardly projecting portion, the flange having a rim extendingabruptly inward at a right angle to the up per conical part and thenextending down wardly in a diverging conical form with the margin bentoutwardly to form a bead, which rim is adapted to have a frictionlocking engagement with a substantially straight-walled jar top solelyby downward pressure on the top of the closure without reformation ofthe closure, the flange being rovided with-an outwardly extending annuarportion adjacent the inwardly project ing rim portion, and acomparatively thin gasket of compressible sealing material held in theclosure by the 'frim, which is compressed on application of the closureto entirely fill the space between the jar side and top and the flangeside and top portion.

above the rim. Q

' CHARLES HAMMER.

